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Laser-Rayleigh Imaging of DME Sprays in an Optically Accessible DI Diesel Truck Engine

Andersson, Öivind LU ; Collin, Robert LU ; Aldén, Marcus LU and Egnell, Rolf LU (2001) SAE World Congress, 2001 In SAE Technical Paper 2001-01-0915
Abstract
Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat... (More)
Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat release at a given time. The combustion can not be described as purely premixed or purely mixing-controlled at any time, but always has an element of both. After all fuel appears to have vanished there is still an extended period of heat release. This indicates a rich combustion yielding combustible products. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
SAE Technical Paper 2001-01-0915
pages
12 pages
publisher
Society of Automotive Engineers
conference name
SAE World Congress, 2001
external identifiers
  • scopus:84877546856
DOI
10.4271/2001-01-0915
language
English
LU publication?
yes
id
99e9640e-fa8d-4c1a-ad9d-595e9be38b5a (old id 4935735)
date added to LUP
2015-01-19 14:14:55
date last changed
2017-01-01 08:06:51
@inproceedings{99e9640e-fa8d-4c1a-ad9d-595e9be38b5a,
  abstract     = {Laser-Rayleigh imaging has been employed to measure the relative fuel concentration in the gaseous jet region of DME sprays. The measurements were performed in an optically accessible diesel truck engine equipped with a common rail injection system. A one-hole nozzle was used to guarantee that the recorded pressure history was associated with the heat release in the imaged spray. To compensate for the low compression ratio in the modified engine the inlet air was preheated. Spray development was studied for two levels of preheating, from the start of injection to the point where all fuel was consumed. The results indicate that there is a strong correlation between the amount of unburned fuel present in the cylinder and the rate of heat release at a given time. The combustion can not be described as purely premixed or purely mixing-controlled at any time, but always has an element of both. After all fuel appears to have vanished there is still an extended period of heat release. This indicates a rich combustion yielding combustible products.},
  author       = {Andersson, Öivind and Collin, Robert and Aldén, Marcus and Egnell, Rolf},
  booktitle    = {SAE Technical Paper 2001-01-0915},
  language     = {eng},
  pages        = {12},
  publisher    = {Society of Automotive Engineers},
  title        = {Laser-Rayleigh Imaging of DME Sprays in an Optically Accessible DI Diesel Truck Engine},
  url          = {http://dx.doi.org/10.4271/2001-01-0915},
  year         = {2001},
}